Brochure

Model MB Venturi Type Balancing Valve 0.50” - 2.00”
Dierential Pressure: Inches W.C
Model MB – Model MB –
Flow
050L 050H 075L 075H
Flow
GPM
075CL
075RL 075RH
075CH
100RL
100CL
100RH
100CH 100 125 150
GPM
0.10
0.20
0.30
0.42
0.50
0.75
1.00
1.25
1.35
1.50
2.00
2.25
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.25
7.50
8.00
8.50
9.00
9.50
10.00
10.50
11.00
11.50
12.00
12.50
13.00
14.00
15.00
16.00
17.00
1
2
5
10
14
31
55 6
86 9
101 11
124 13
221
23
29
36
52
71
92
117
144
175
208
244
4
6
7
9
16
21
25
36
50
65
82
101
123
146
171
213
228
4
6
8
10
13
15
19
22
26
33
35
40
45
50
56
62
68
75
82
89
97
105
121
139
159
179
4
5
6
9
13
16
21
26
31
37
43
54
58
65
74
83
92
102
113
124
135
147
160
173
200
8
10
11
12
14
15
17
19
21
23
25
27
30
32
37
43
49
55
10
11
12
14
15
16
18
19
22
25
29
33
18.00
19.00
20.00
21.00
22.00
23.00
24.00
25.00
26.00
27.00
28.00
29.00
30.00
31.00
32.00
33.00
34.00
35.00
36.00
37.00
39.00
40.00
41.00
42.00
43.00
44.00
45.00
48.50
55.00
60.00
65.00
70.00
75.00
62
69
76
84
92
101
110
119
129
139
149
160
171
183
195
207
220
233
125
36
41
45
50
54
60
65
70
76
82
88
95
101
108
115
122
130
138
146
154
171
180
189
198
208
218
228
150
14
15
17
19
21
23
25
27
29
31
34
36
39
41
44
47
50
53
56
59
65
69
72
76
79
83
87
101
130
154
181
210
241
200C
0.50" L 0.50" H 0.75"L 0.75" H
0.75" RL 0.75" RH 1.00" RL 1.00" RL
0.75" CL 0.75" CH 1.00" CL 1.00" CL 1.00" 1.25" 1.50" 1.25" 1.50" 2.00" C
2.00"
200
FF
0.1346 0.4163 0.4967 1.2704 0.9889 2.2921 2.9816 2.2921 2.9816 4.8274
Size
Flow Formulas Notes
GPM = FF x ( DP) 2) Repeatability +/- 0.25% of rate
DP = (GPM/FF)
2
3) Values in BOLD type represents traditional 10" to 100" sizing range
PPL= DP*0.12 4) All valves will function above and below ranges shown. Pressure drop
and readability should be taken into account.
1) Accuracy ± 3% of flow rate
Tunstall Corporation 118 Exchange Street Chicopee, MA 01013 www.tunstall-inc.com
Form# FCMB-03.14
1
1.5
3
1
2
1
1.4
2.5
3
1
1.5
2
2.3
1.2
1.7
2.3
3
4
5
6
7
1.4
1.8
2.3
3
3.4
4
5
6
6.4
7
8
9
√